Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6619888 | Flange nut for mine roof bolt | Frank Calandra, Jr., Michael Cokus, Steve Oyler, John G. Oldsen | 2003-09-16 |
| 6612783 | Cable bolt with mixing delay device | John G. Oldsen | 2003-09-02 |
| 6599059 | Three-prong shell | Frank Calandra, Jr., Brandon Demrey, Jack R. Eaton, Larry Boozer | 2003-07-29 |
| 6527482 | Grit surface cable products | — | 2003-03-04 |